防毒面具
聚丙烯腈
过滤(数学)
膜
材料科学
色谱法
体积流量
气溶胶
化学
复合材料
量子力学
统计
物理
生物化学
有机化学
聚合物
数学
作者
Qifei Wang,Yingzhen Wei,Wenbo Li,Xizi Luo,Xinyue Zhang,Jiancheng Di,Guoqing Wang,Jihong Yu
标识
DOI:10.1002/anie.202108951
摘要
The longevity and reusability of N95-grade filtering facepiece respirators (N95 FFRs) are limited by consecutive donning and disinfection treatments. Herein, we developed stable N97 nanofibrous respirators based on chemically modified surface to enable remarkable filtration characteristics via polarity driven interaction. This was achieved by a thin-film coated polyacrylonitrile nanofibrous membrane (TFPNM), giving an overall long-lasting filtration performance with high quality factor at 0.42 Pa-1 (filtration efficiency: over 97 %; pressure drop: around 10 Pa), which is higher than that of the commercial N95 FFRs (0.10-0.41 Pa-1 ) tested with a flow rate of 5 L min-1 and the 0.26 μm NaCl aerosol. A coxsackie B4 virus filtration test demonstrated that TFPNM also had strong virus capture capacity of 97.67 %. As compared with N95 FFRs, the TFPNM was more resistant to a wider variety of disinfection protocols, and the overall filtration characteristics remained N97 standard.
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